Abstract
Recently, a new simple method for the purification of CdSe-CdS-ZnS quantum dots by using membrane filtration, the filtration process, successfully separated the oleic acid from quantum dots through membranes purification after synthesis; purification of quantum dots is a very significant part of post synthetical treatment that determines the properties of the material. We explore the possibilities of the Langmuir-Blodgett technique to make such layers, using quantum dots as a model system. The Langmuir monolayer of quantum dots were then investigated the surface pressure-area isotherm. From isotherm, we found the surface pressure monolayer changed with time.
Highlights
The interest of nanoparticles – semiconductor quantum dots, – it was continued to increase in last decades
The solution of colloidal quantum dots stabilized oleic acid in chloroform to about 10-6 M concentration of 125 μl was placed in a dialysis bag which was immersed in the box with chloroform
The data obtained during the compression isotherm measurement shown in (Fig. 3)
Summary
The interest of nanoparticles – semiconductor quantum dots, – it was continued to increase in last decades. Purification of quantum dots – it’s very important process after synthesis. Purified quantum dots (QDs) are the foundation for the creation of light-emissive devices. As well it’s difficult due to a small selection of suitable solvents, irreversible adsorption with other materials, aggregation.
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